COMPARATIVE STUDY OF THE GROWING PERFORMANCES IN RAINBOW (ONCORHYNCHUS MYKISS) AND FOUNTAIN TROUT (SALVELINUS FONTINALIS)

Abstract

The samonidae species reared in are mainly represented by the rainbou (Oncorhynchus mykiss) and fountain trout (Salvelinus fontinalis). The technology of rearing and exploitation is the same for both species, but results are different function of location and biological material (selected/improved). The growing performances of both trout analyzed species, reared in different conditions were analyzed. The data presented in table 1 show very significant differences between trout species in analyzed trait. The fountain trout reared in floatable pools recorded the average body weight of 266 g at 1 year of age, compared to rainbow trout which rcorded the same values at 2 years of age in rearing conditions from classical pool. The differences were determined by different rearing conditions (water temperature, turbidity) in both rearing pools thatinfluece feeding, the coefficient of forage conversion, and process of growing and body weight accumulation. In floatable pools, the fountain trout was constantly fed, compared to raibow trout that was intemitently fed due to temperature and turbidity oscilations. The quality of administered forages, and quality of the biological material explain these differences.